Translated and adapted from the video description:

The 1st stage of the Arden Challenge - a Belgian cycling race held in the province of Luxembourg, in Wallonia - could have gone very wrong. 10 kilometers from the finish line, a runaway horse interfered in the race and started chasing the cyclists. Its presence clearly disturbed the cyclists, who fortunately did not fall. The animal was then stopped admirably by the young Belgian rider Lars Daniels (Antwerp Cycling Team Kontich), who, given the situation, intervened immediately.